Page:Field Notes of Junius Henderson, Notebook 4.pdf/25



[N-S cross section in field book] 160 species, all upper San Pedro.

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Hard sand beneath 100 ft. of soft sand at mouth of canyon at end of large wharf. 16 species, Pleistocene.

Pleistocene, N of, 3 mi. E. of <, nearly to summit of "The Peak", 25 ft. fossiliferous in many layers. 50 species, Peak 1000 ft or more high.